摘要
在城市生活垃圾中,大约有一半的氯来自PVC废物。在垃圾焚烧过程中,PVC含量的增加可导致HCl产生量的增加,并有可能成为二生成的氯源。PVC中铅含量最高,但对生活垃圾相对贡献量不大。PVC对生活垃圾的镉相对贡献量最大,而且在含PVC垃圾焚烧过程中烟气中镉的浓度也有明显增加。此外,PVC有使重金属从底灰向飞灰转移的趋势,这对于后续的底灰处置是有利的。在分析PVC对城市垃圾焚烧过程影响的基础上,本文最后提出了结论和建议。
PVC is an important source of chlorine in the municipal solid wastes (MSW), and PVC contributed about half the Cl content of MSW. In the incineration process of MSW, the generation of HCl is positively correlative to the amount of PVC in the MSW, which possibly become the chlorine source of dioxin generation. The influence of PVC on heavy metal content in MSW is only significant for cadmium, and the Cd compound concentration in the fluegas increased significantly as the content of Cl in the MSW increased. Compared with other heavy metals, lead had maximum content in the PVC waste, however PVC contributed less than 1% the lead to MSW. Additionally, PVC also promoted the transfer of heavy metals from residues to fly ash. Based on analyzing the environmental impact of PVC in the MSW, some conclusion was drawn finally, in order to facilitate management and treatment of MSW.
出处
《城市环境与城市生态》
CAS
CSSCI
CSCD
北大核心
2003年第2期22-24,52,共4页
Urban Environment & Urban Ecology
基金
清华大学环境科学与工程研究院基础研究基金(C0109)
